What is a cognitive milestone of a baby?

Sunlight strikes a solar panel, which is then used to power the lights in a house. What are the energy transformations taking place in this system? O A. Thermal energy to chemical energy to kinetic energy O B.

A ball of mass 0.159 kg is dropped from rest from a height of 3.150 m. ( a. what is its momentum at the start and ( b. what is its momentum after falling 3.150 meters?

Instruments use resonance to amplify sound. t/f

Define the emission spectrum.

Atoms contain subatomic particles called protons and neutrons. When these protons and neutrons split, a lot of energy is released. What kind of energy is this? nuclear radiant thermal chemical

Which medium below conducts sound the fastest? A. a wall B. Steel C. Plastic D. Cardboard

Fariza wears a red hat in her school play. On stage, she is lit by a spotlight shining only green light. When our eyes receive no light from an object, it looks black. Explain why Fariza's hat looks black on stage.

In a chemical reaction, one element replaces another element in a compound to form a new substance. Which of the following best describes this type of chemical reaction? Combustion Neutralization Double Replacement Single Replacement

If the Earth's crust contained twice as much iron as it does, would atmospheric oxygen buildup have been slowed down or sped up during the past 2.

Which of the following statements is true? A. Energy can change from one form to another. B. Matter and energy do not interact. C. Energy cannot be stored. D. Energy does not transfer from place to place.